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Finding the Fourth Proportional to 361,918.40, 542,877.60 and 268,606.40

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Solution

The fourth proportional to 361,918.40, 542,877.60 and 268,606.40 is: 402,909.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,918.40 : 542,877.60 = 268,606.40 : x
  2. Step 2: Convert to fraction form
    361,918.40/542,877.60 = 268,606.40/x
  3. Step 3: Cross multiply
    361,918.40x = 542,877.60 × 268,606.40
  4. Step 4: Simplify right side
    361,918.40x = 145,820,397,776.64
  5. Step 5: Solve for x
    x = 145,820,397,776.64/361,918.40
  6. Step 6: Final answer
    x = 402,909.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.